How to justify migration from Java 6 to Java 7?@ Andrew Finnell : Sorry. I did not think it was that relevant. The actual porting was completed in less than a week. Mainly due to sun proprietary api's we used. It was a function specific compatibility affected code than actual number of lines of code( 4million approx). The delay caused was due to various factors like tools support- For example code coverage using cobertura 2.0. is just stabilizing. Another tool was Rational Functional Tester which required an upgrade (we chose not to do). May be I will write a note on overall factors affected the effort..